Machine for threading pipe.



V. E. ANKARLO. MACHINE FOR THREADING PIPE. APPLIUATION FILED SEPT. 12,1907.

Patented Feb. 23, 1909. S

IN VEN TOR.

I WITNESSES:

ATTORNEY.

VICTOR E. ANKARLO, OF SOHERVILLE, MASSACHUSETTS.

MACHINE FOR THREADING PIPE.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application filed September 12, 1907. Serial No. 392,454.

To all whom it may concern:

Be it known that I, VICTOR E. AxKAnLo, of Somerville, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulMachine for Threading Pipe, of which the following is a specification.

The objects of my invention are to provide a machine for threading pipewhich will be more efficient, easier to handle and which will occupyless space than any device now in use, and my invention consists mainlyin the combination of a member which is to be attached to the pipe; asecond member mounted to move along the first member; a spring whichcooperates with both members and when compressed tends to cause relativemovement between the two members; and means mounted on one member andengaging the other to cause relative movement between the two membersand thereby compress the spring.

Other features will be pointed out below.

In the drawings Figure l is a vertical section of a machine embodying myinvention; Fig. 2 is a detail described below; Fig. 3 is a plan of mydie holder; and Fig. 4c is a section thereof.

Member A which in the form shown is a metal tube, embraces pipe B, whichmay be held in position by a vise, as usual. The lower end of member Ais flared at the inside and threaded at the outside.

Member D may be called an intermediate member and is mounted to slide upand down on member A and carries shaft d and small gear d as well asshaft (Z and gear (i which is relatively large as compared with gear dShaft (l carries bevel gear (i which meshes with teeth on the dieholding member E which is mounted to rotate on member D. The die holdingmember E is rotatably connected with member D by clip d and screw d DieE has a threaded bore and is held in place in the die holder by clips 6e which are screwed into the die holder and may be turned as shown inFig. 1 to hold the die in place. Flange 6 supports the die in the dieholder.

I provide aperture 6 in member D to allow for the escape of clips duringthe threading of the pipe.

Between annular shoulder a in member A and shelf d on member D I providea spring d" which when compressed tends to force movable member D downalong member A.

Mounted in member D is shaft H having at one end handle it and at theother end eccentric h. The shaft when released will spring outward underthe influence of spring 7L2 and eccentric it will then rest in recess itWVedge G is placed between member A and the pipe and is pushed upward byrotation of nut F to cause a firm attachment of member D to member A.

Member D is slotted at (Z to receive roller (Z which is mounted on boltd whose inner end is threaded to engage member A. Nut 6 cooperates withbolt (6 to allow up and down movement of member A but to prevent rotarymovement of member A. Handle K fits shafts (Z and d and may be used togive a slow rotation of shaft 03 to do the threading or by connectionwith shaft (Z may be used to give a relatively quick unthreading of thedie from the pipe.

Fig. 3 is a plan of my die holder E being on a smaller scale than thedie holder of Fig. 1. This die holder has a circular bore to receive around die Z which is held against rotation by slides p 39 mountedadjustably in slots 0 0. If I desire to use a square die I insert it inthe die holder which has shelves m m at the four corners to support thedie. I may also use two rectangular pieces to form the die in which caseeach piece would be inserted in recess n.

In using my machine I place it over the pipe to be threaded, which pipewill be secured as usual by a vise or otherwise. The machine is broughtdown over the pipe until the die rests upon the top of the pipe. MemberA is then forced down by cam 72. with the result that spring al iscompressed. Nut F is then turned and forces wedge G up between the pipeand member A securely attaching them together. When this is done theeccentric h is released by withdrawing it into its recess whereupon thespring will tend to force the die down along the pipe. At this time thehandle will be rotated and through the gearing the die will also rotate.

When the die has been sufiiciently threaded and it is desired to removethe die from the pipe it may be done in several ways, all of which ofcourse contemplate a reversal of the previous rotary movement of thedie. One way would be to turn the handle in the opposite direction fromthat in which it turned before. Another way is to remove the handle fromone shaft to the other and rotate that second shaft and in this case ofcourse the unscrewing of the die will be done much more quickly. Anotherway would be to unscrew nut F which will release member A from the pipe.Then turn the holding dogs which hold the die in place and lower themachine along the pipe in which case the end of the pipe with the dieupon it will be above the machine and the die may be unscrewed by hand.

It will be clear from the above that with my machine the work may bedone much more quickly than heretofore that it can be readily done withone hand, that the work will be much more accurate because the movementof the die along the pipe is had in a rigid bearing and that the machineoccupies very much less space than heretofore.

hat I claim is:

1. In a machine of the character described the combination of a memberto be attached to the pipe; a second member mounted to move along thefirst member and carrying a die; a spring cooperating wlth both members,and when compressed tending to cause relative movement between the twomembers; and means mounted on one member and engaging the other to causerelative movement between the two members, and thereby compress thespring.

2. In a machine of the character described the combination of a memberto be attached to the pipe; a second member mounted to move along thefirst member and carrying a die; a spring cooperating with both members,and when compressed tending to cause relative movement between the twomembers; and an eccentric mounted on one member and engaging the otherto cause relative movement between the two members, and thereby compressthe spring.

VICTOR E. ANKARLO.

lVitnesses G. A. RocKwELL, M. G. HENNEssY.

